Fuel distributor for stokers



June l,y 1943.

H. s. MANN E-rAL 2,320,443

FUEL DISTRIBUTOR FOR STOKERS origial Filed De. 2. 195e $6' INVENTOR Aff/Wfl Mmw BY Ef/avfwf/f/vrmv Patented June 1, 1943 l FUEL DISTRIBUTOR FOR STOKERS Henry S. Mann, Chicago, Ill., and Eugene Martin,

Erie, Pa., assignors The Standard Stoker Company, Incorporated, a corporation of Dela- Wail'e Original application December 2, 1936, Serial No.

113,774. Divided and this application December 6, 1940, Serial No. 368,852

(CLIN-105.5)

2 Claims.

This invention relates to stokers of the type in which fuel is conveyed from a source of supply to the firing opening in an upright wall of a furnace rebox and is forcibly projected into the rebox and scattered overthe firebed.

The primary object of the invention is to provide a novel and efficient fuel distributing apparatus for stokers of the type described.

A type of fuel distributing mechanism that 'has met with considerable success comprises a table or plate extending forwardly from the discharge end of the fuel delivery conduit of the fstoker through the lower portionof the firing opening and into the flrebox. A jet head is disposed at the rear of the tab-le and a blast of fluid under pressure issuing therefrom projects ,the fuel forwardly across the table and into the rebox. Laterally curving upstanding ribs on the forward portion of the tabledeflect a portion ofthe fuel to the rear corner portions of the fuel bed. Because of the proximity of the table to the firebed and the fact that it extends into the firebox, the forward portion thereof burns off to an extent requiring frequent replacement.

' It is, therefore, an object of the present invention to provide a fuel distributing mechanism in which fuel is distributed evenly over the entire fuel bed, regardless of the length of the firebox, and at the same time providela construction requiring infrequent replacement.

Other objects of 4the invention reside in the novel construction of the parts and in their combination and relation with one another, substantially as described in the following specification and as shown in the accompanying drawing, in which Fig. 1 is a central vertical longitudinal sectional View through the rear part of a locomotive with a stoker embodying the improved distributing mechanism applied thereto and shown in similar section;

Fig. 2 is an enlarged View in similar section of a portion of the mechanism shown in Fig. l, and taken on the line 2--2 of Fig. 3; and

Fig. 3 is a sectional plan View taken on the line 3-3 of Fig. 2.

Referring to the drawing, a locomotive is indicated by L and it comprises a boiler II), having a hollow backwall Il at the rear of the rebox I2. Within the backwall II there is provided a firing opening 9, the lower edge of which is disposed above the firebox grates I3 and also above the plane of the cab deck I4.

Leading forwardly from the tender (not shown) is a conveyor I5 of a stolzer which is ,indicated generally by S. The conveyor I5 comprises a pair of intertted telescopic conduits I6, I1; the outer conduit I6 at `its forward end is provided with a spherical portion I8 received in a spherical seat I9 of the elbow 20, while the inner conduit I1 provides a bearing for ights 2| of the conveyor screw 22. At the forward end of the conveyor screw 22, the flights 2l are of multiple form in order to facilitate upward Inovement of fuel through the Stoker delivery conduit 23.

The stoker delivery conduit 23 comprises the elbow 20 and a conduit portion 24 received by the upper end of the elbow 2D and firmly secured thereto by means such as the set screw 21. The upper central portion of the forwardwall 32 of the conduit portion 24 turns forwardly toward the lower portion of the firing opening 9 and terminates thereat. The rear wall 33 of the conduit portion 24 likewise turns inwardly vto form the top wall 34 which merges with the side walls 35, 35a to form the fuel discharge mouth 29. The portion of the firing opening 3 above the top wall 34 is closed by the usual firedoor 36.

Within the lower portion of the firing opening 9, the forward wall 32 is provided at its upper end with a lipl 31 forming a seat for the rearward side of a platform 11. Seated partly upon the platform 11 and partly .upon the upper surface of the forward Wall 32 are a pail` of pressure fluid jet members 16, 16a provided with vertical front faces 43 having jet `apertures 58. Fluid under pressure is supplied to the jet members 15, 16a by the supply pipes 50.

On its forward side, the platform 11 is provided with a ledge 53 below the upper surface of said platform and upon which ledge 53, a fuel distributing table 15 is seated and secured by suitable means, as the pins 9B. The forward end of the table 15 terminates in approximately the 4 plane of the inside sheet of the backwall II and since it does not protrude beyond the confines of the firing opening it is protected from the intense heat of therebox and is not so readily burned off.

In order to control the relative amounts of fuel delivered onto different parts of the table 15 and in front of the jet members 16, 16a, a pair of fuel deflecting vanes 8|, 8Ia are mounted for pivotal movement about upright pins 63, 63a. The vanes 8l, 8Ia are independently operable by means of screws 64 threaded into respective side walls 35, 35a and provided exteriorly of the conduit 24 with operating handles 65.

the jet members 76, 16a is projected thereacrossA by the pressure fluid blast issuing from vthe jet apertures 58 over the firebed. Since the forward end of the table 'l5 is disposed approximately in plane of the inside sheet of the backwall Il, the table 'l5 itself cannot effect a lateral distribution of fuel to the rear sides and corners of the rebox. A pair of deflectors 13, 73a are provided, one at each side of the Stoker discharge mouth 29.

Each defiector 18, 18a includes a laterally curved wall 19 depending from a forward end of an arm 89, each wall 19 being arranged to intercept fuel particles projected across the table "i by the jet members 76, a. The rearward end of each arm 89 of the deflectors 18, 78a is secured to a respective fuel deflecting vane 8|, Bla'. The upper surface of the distributing table is provided at each side of its central, substantially` horizontal, unobstructed, flat portion with a forwardly extending inclined portion 85, 85a which portions cooperate to direct fuel forwardly and upwardly against the wall 'I9 of each of the defectors 18, 18a.

From the above description it is apparent thatv the distributing table 'l5 is protected from the intense heat of the firebox, at the same time a support is provided for the fuel as it is projected to the far reaches of the firebox and its forward path is unimpeded by any part of the distributing mechanism. The corner portions of the fire bed are taken care of by the cooperation of the inclined Side portions 85, 85a of the table 'l5 and the. deflectors 18, 18a. Since the deflectors 18, 18a are shielded from the re by the fuel stream and the stream blast, they arewell protected against rapid burning off by the intense heat of the rebox.

The distributing mechanism is thus arranged for maximum protection against burning and consequent replacement and vat the same time provides for improved fuel distribution.

This is a division of our application Serial No. 113,774, filed December 2, 1936, now vPatent No. 2,228,838.

We claim:

1. A stoker for a rebox having an upstanding wall with a firing opening therein, said stoker comprising a fuel feed conduit communicating with said opening, a pressure fluid head at the forward side of the discharge end of said conduit, a table extending forwardly of said pressure fluid head for receiving fuel from said discharge conduit, said table on its upper surface having a pair of laterally spaced sloping portions inclined forwardly and upwardly with respect to the central portion of the upper surface of said table, said pair of sloping portions each having a plane uninterrupted upper surface of greater width than length, said pressure fluid head having a plurality of forwardly directed jet apertures for the emission of blasts of fluid under pressure across the central and inclined portions of said table, and laterally spaced fuel deflecting means above and extending forwardly of the inclined portions of said table for intercepting at least a portion of the fuel projected across the inclined portions of said table and diverting it to the rear corner portions of said firebox.

2. A Stoker for a firebox having an upstanding wall with` a firing opening therein, said stoker comprising a vfuel feed conduit communicating with said opening, a pressure fluid head at the forward side of the discharge end of said conduit, a table extending forwardly of said pressure fluid head for receiving fuel from said discharge conduit, said table having a substantiallyhorizontal, unobstructed central top surface and a forwardly and upwardly sloping portion on each side of said central portion having a plane uninterrupted top surface, said pressure uid head having a plurality of forwardly directedjet apertures for the emission of blasts of uid under pressure across the central and sloping portions `of said table, and laterally spaced fuel deflecting means above and extending forwardly of the inclined portions of said table for intercepting at least a portion of the fuel projected across the sloping portions of said table and diverting it to the rear corner portions of said rebox, the extended axes of said jet apertures being below the level of said fuel deflecting means and intersecting the plane of said laterally spaced sloping portions of said table.

HENRY S. MANN. EUGENE MARTIN. 

